Stop motion



?atented Feb. 3, 1931 UNE WALTER J. SCTT, O?? VGGNSOCKET,

RHDE ISLAND STOP MOTEGN Applicatien filed August 21, 1929. Serial No. 387,375.

lThis invention relates to an improved construction of stop motion for a'sliver feeding machine and has particular reference to electric stop motions.

One object of the invention is to provide a Contact arm in a sliver feeding machine arranged to extend into a position engageablc by one of the bearings of the sliver feed rolls so that should the sliver become wound about 1;; the feed rolls to separate the same excessively the lifting of the bearing would engage the contact arm and complete an electric circuit to stop the machine.

A further object of the invention is to so l: construct this contact arm of the electric stop l motion that it may be readily swung out of Contact position and permit the roll and its bearing' to be readily removed from the frame in which it is mounted.

invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is a side elevation showing a pair of sliver feed rolls with my improved electric stop motion attached thereto;

l Fig. 2 is an enlarged detail illustrating a 3G Stop lug on the contact arm which causes the arm to extend over the bearing block to normally retain the Contact pinfout of engagement with the top roll bearing;

Fig. 3 is a detail illustrating the wrapping of the sliver around the rolls, thus separating the rolls and contacting the roll bearing with the electric stop motion to stop the machine;

Fig. 4 shows the stop motion arm in normal position, and as swung back out of operating position, the latter position being shown in dotted lines; f

Fig. 5 is a diagrammatic view showing the mechanism operated by the stop motion to stop the machine; and

Fig. 6 is a sectional view of a modified construction.

lt is of great advantage to so position a stop mo-tion for a sliver feeding machine that the machine will be automatically stopped whenever a broken sliver builds up on the ISA W ith these and other objects in view, the

draft rolls and moves the bearing block of the self-adjusting upper roll into Contact with the stop motion, the stop motion being constructed to be readily removed out of the path of the bearing block whenever the bear- 55 ing block and roll are withdrawn from the machine, without dismantling of the stop motion. My present invention relates to a stop motion of this type, which effectively operates whenever a broken sliver builds up eo on the draft rolls, which may be shifted out of the path of movement of the upper roll and the bearing block rwhenever desired, and may be instantly returned to operative position upon replacement of the upper roll and ce bearing block; and the vfollowing isa de-y tailed description of a preferred embodiment of my invention.

v Considering the drawings, the sliver 10 passes through one lpair of draft rolls 11, 70 through the usual comb 12, through the selfadjusting'draft rolls 13, over` the guide roll 14 and then through the, spindle 15, the flier wing 16, and the flier 17 to be wound upon the bobbin 18. The/bobbin 18 is seated on the 75 usual felt disk 19 of the bottom lifting plate 20, the usual lift rack 21 and ,lift pinion 22 serving to reciprocate the bobbin while the belt 23, spindle pulley 24, and drive pulley 25 rotate the bobbin through its frictional so engagement with the felt disk.

The draft rolls 13 comprise a lower roll 13a and an upper heavy roll 13b, the lower roll having its ends mounted in suitable fixed bearings 26 within the bearingy frame 27, and 85 the upper roll 13b having its ends positioned in a self-adjusting bearing 28 vertically shiftable within` the frame 27.

My improved stop motion includes a body portion 28 and an arm 29 hingedly secured 9G together. the body portion 2b having a vertical slot- 30 therein through which a screw 3l or the like passes to adjustably position the stop motion on the side of the bearing frame 2?. The upper end of body portion 28 has 95 a protruding section 32 which serves as a'seat for a stop lug 33 extending downwardly from the arm 29. The arm 29 has an upward eX- tension 34C within which an electrical Contact member 35 is removably secured, this contact 1Q() member having a vertical slot 36 through which an adjustable Contact pin 37 extends, a threaded nut 38 screw-threadedly engaging the end of contact member 85 and being manually movable to advance a lock block 39 within the vertical slot 36 for locking the contact pin 37 in a desired adjusted position. A spring 40 engages the body portion 28 and the arm 29 and serves to maintain the stop lug 33 in contact with its seat 32 and thus maintain the Contact pin 37 in operative position over the end of bearing block 28.

Referring to Figure 5, it will be noted that the bearing frame 27 is grounded, whereby upward movement of the bea-ring. block 28 n ill engage the contact pin 37 and cause the electrically operated catch member 4l to release the latch 42, thus permitting movement of the shift lever 43 under the influence of tension spring 44 to move the belt shifter' 45 and stop the machine. When the machine is started, movement of lever 43 in the opposite direction causes the latch 42, which is pivotally mounted in suitable brackets 46, to swing until the end of latch 42 passes the catch partof catch member 41, whereupon the latch tension spring 47 turns the latch 42 to lock the same in position.

Referring to` Figure 4, it is clear that whenever tbe top roll 13b or the bearing blocl: 2S is to be removed from the frame, the arm 29 may be turned to the dotted line position, in which position the spring 40 serves as a stop spring; when the upper roll and the bearing bloclr are replaced, a swinging of arm 29 again places the contact pin 37 in proper, adjusted, operating position.

ln certain installations, itis found preferable to use a flat spring. The stiucture is slightly modified, as shown in Figure 6, the body portion 28a having protruding section 32a which serves as a stop section for the arm 29a. A flat spring 40a is secured to the arm 29a by screws or the like 48, the end 49 of the iiat spring abutting against the body portion 28a when the arm 29a is swung out of the l path of the top roll and the bearing block, and

the rear of the spring normally engaging a raised section 50 on the-body portion 28a to tension the spring and maintain thel arm 29 in contact' with the stop section 32o.

My improved construction therefore provides a simple and easily constructedstop motion which may be rigidly fastened to the draft roll framework, which operates whenever any building up of the sliver on the draft polls occurs, which may be instantly removed and the bearing block without detachment from the bearing frame, andy which may be instantly replaced in adjusted y operating position.

Having thus described one specific embodiment of my invention, it is obvious that desired changes in construction and in arrangeiroin the path of movement of the upper roll,

ment may be made, within the scope of the invention as defined in the appended claims.

l claim:

l. In a sliver feeding machine, a pair of sliver draft rolls, a movable bearing block in which the upper draft roll is mounted, an electric circuit, a stop motion in said circuit, a contact arm in said circuit movably mounted on the frame of the machine, a contact pin adjustably mounted in said contact arm, said bearing block engageable with said contact pin upon upward movement of said upper roll to complete the electric circuit and stop the machine, said contact arm being readily movable to permit withdrawal of said upper roll and bearing block.

2. ln a sliver feeding machine, a pair of sliver draft rolls, a pair of movable bearing blocks in which the upper draft roll is mounted, an electric circuit, :i contact arm hingedly secured to the machine frame, a fixed scat on said frame, a positioning lug on said contact arm engaging said lined seat, spring means to normally maintain said positioning lug in engagement with said fixed seat, one of said bearing blocks engageable with said contact arm upon upward movement of said upper roll to complete the electric circuit to stop the machine, said contact arm being movable to permit withdrawal of said upper roll and bearing blocks.

3. ln a sliver feeding machine, a pair of sliver draft rolls, a pair of movable bearing blocks in which the upper draft roll is mounted, an electric circuit, a Contact arm in said circuit and hingedly secured to the frame, a contact pin adjustably mounted in said contact arm 'engageable with one of said bearing blocks upon upward movement of said upper roll to complete the electric circuit to stop the machine, said contact arm being readily movable to permit withdrawal of said upper roll and bearing block, and a spring for yieldably pressing said arm towards operating position.

ln testimony whereof l aflizr my signature.

1rWAI/FER J. SCOTT. 

